Update README.md

README.md

@@ -12,4 +12,19 @@ dataset_info:
 ---
 # Dataset Card for "wikipedia20220301en-bookcorpusopen-chunked-shuffled"
 
-[More Information needed](https://github.com/huggingface/datasets/blob/main/CONTRIBUTING.md#how-to-contribute-to-the-dataset-cards)
+
+```
+num_examples: 33.5 million
+download_size: 15.3 GB
+dataset_size: 26.1 GB
+```
+
+This dataset combines [wikipedia20220301.en](https://huggingface.co/datasets/wikipedia) and [bookcorpusopen](https://huggingface.co/datasets/bookcorpusopen),
+and splits the data into smaller chunks, of size ~820 chars 
+(such that each item will be at least ~128 tokens for the average tokenizer). 
+The chunks have been shuffled.
+The logic only splits on spaces, so the chunks are likely to be slightly larger than 820 chars. 
+The dataset has been normalized into lower case, with accents and non-english characters removed.
+Items with less than 200 chars or more than 1000 chars have been removed. 
+The data has not been shuffled (you probably want to shuffle before using).
+